Galant V6-3.0L SOHC (2003)
NO: Refer to Inspection Procedure M-5 "ETACS-ECU does not receive any signal from the passing switch."
Inspection Procedure H-5
Headlight and Taillight: Headlights do not illuminate when the lighting switch is at "AUTO," "TAIL," and "PASSING" position, but
illuminate at low-beam when the switch is at "HEAD" position. At this position, the headlights cannot be changed into high beam by operating
the dimmer switch.
NOTE: This troubleshooting procedure requires the use of scan tool MB991502 and SWS monitor kit MB991862. For details on how to use the SWS
monitor, refer to "How to use SWS monitor."
TECHNICAL DESCRIPTION (COMMENT)
If the headlights illuminate at low-beam regardless of the lighting switch positions, the headlight operation is in fail-safe mode.
TROUBLESHOOTING HINTS
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The column switch may be defective
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The front-ECU may be defective
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The ETACS-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
Required Special Tools:
-
MB991223: Harness Set
-
MB991502: Scan Tool (MUT-II)
-
MB991862: SWS monitor kit
Use scan tool MB991502 to select "ECU COMM CHK" on the SWS monitor display.
Check the following ECUs:
-
ETACS-ECU
-
Column-ECU
-
Front-ECU
CAUTION:
To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool
MB991502. Connect the DLC harness before connecting the column-ECU harness. Be sure to connect SWS monitor kit MB991862 after turning on scan
tool MB991502.
